I believe only about 5 songs or so are missing from this discography, but yes this is nearly complete. A good majority were ripped by grimriper, others come from other sources. The earliest recording is "Butterfly is a Fly Gal Now" from 1919 and the last few are from the early 1940s.
Belle Baker was an exceedingly popular vaudeville and early radio performer. Her standards veered between ragtime, torch songs and Yiddish songs. A wonderful selection, and her voice is one of the best there ever was!